1 /* $OpenBSD: sdtemp.c,v 1.16 2022/04/06 18:59:28 naddy Exp $ */
2
3 /*
4 * Copyright (c) 2008 Theo de Raadt
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/param.h>
20 #include <sys/systm.h>
21 #include <sys/device.h>
22 #include <sys/sensors.h>
23
24 #include <dev/i2c/i2cvar.h>
25
26 /* JEDEC JC-42.4 registers */
27 #define JC_TEMP 0x05
28
29 /* Sensors */
30 #define JCTEMP_TEMP 0
31 #define JCTEMP_NUM_SENSORS 1
32
33 struct sdtemp_softc {
34 struct device sc_dev;
35 i2c_tag_t sc_tag;
36 i2c_addr_t sc_addr;
37
38 struct ksensor sc_sensor[JCTEMP_NUM_SENSORS];
39 struct ksensordev sc_sensordev;
40 };
41
42 int sdtemp_match(struct device *, void *, void *);
43 void sdtemp_attach(struct device *, struct device *, void *);
44 void sdtemp_refresh(void *);
45
46 const struct cfattach sdtemp_ca = {
47 sizeof(struct sdtemp_softc), sdtemp_match, sdtemp_attach
48 };
49
50 struct cfdriver sdtemp_cd = {
51 NULL, "sdtemp", DV_DULL
52 };
53
54 int
sdtemp_match(struct device * parent,void * match,void * aux)55 sdtemp_match(struct device *parent, void *match, void *aux)
56 {
57 struct i2c_attach_args *ia = aux;
58
59 if (strcmp(ia->ia_name, "se97") == 0 ||
60 strcmp(ia->ia_name, "se98") == 0 ||
61 strcmp(ia->ia_name, "max6604") == 0 ||
62 strcmp(ia->ia_name, "mcp9804") == 0 ||
63 strcmp(ia->ia_name, "mcp9805") == 0 ||
64 strcmp(ia->ia_name, "mcp98242") == 0 ||
65 strcmp(ia->ia_name, "mcp98243") == 0 ||
66 strcmp(ia->ia_name, "mcp98244") == 0 ||
67 strcmp(ia->ia_name, "adt7408") == 0 ||
68 strcmp(ia->ia_name, "stts424e02") == 0 ||
69 strcmp(ia->ia_name, "stts424") == 0 ||
70 strcmp(ia->ia_name, "stts2002") == 0 ||
71 strcmp(ia->ia_name, "stts2004") == 0 ||
72 strcmp(ia->ia_name, "stts3000") == 0 ||
73 strcmp(ia->ia_name, "ts3000b3") == 0 ||
74 strcmp(ia->ia_name, "ts3000gb0") == 0 ||
75 strcmp(ia->ia_name, "ts3000gb2") == 0 ||
76 strcmp(ia->ia_name, "ts3001gb2") == 0 ||
77 strcmp(ia->ia_name, "tse2004gb2") == 0 ||
78 strcmp(ia->ia_name, "at30ts00") == 0 ||
79 strcmp(ia->ia_name, "at30tse004") == 0 ||
80 strcmp(ia->ia_name, "cat34ts02") == 0 ||
81 strcmp(ia->ia_name, "cat34ts02c") == 0 ||
82 strcmp(ia->ia_name, "cat34ts04") == 0 ||
83 strcmp(ia->ia_name, "gt30ts00") == 0 ||
84 strcmp(ia->ia_name, "gt34ts02") == 0)
85 return (1);
86 return (0);
87 }
88
89 void
sdtemp_attach(struct device * parent,struct device * self,void * aux)90 sdtemp_attach(struct device *parent, struct device *self, void *aux)
91 {
92 struct sdtemp_softc *sc = (struct sdtemp_softc *)self;
93 struct i2c_attach_args *ia = aux;
94
95 sc->sc_tag = ia->ia_tag;
96 sc->sc_addr = ia->ia_addr;
97
98 printf(": %s", ia->ia_name);
99
100 /* Initialize sensor data. */
101 strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
102 sizeof(sc->sc_sensordev.xname));
103
104 sc->sc_sensor[JCTEMP_TEMP].type = SENSOR_TEMP;
105
106 if (sensor_task_register(sc, sdtemp_refresh, 5) == NULL) {
107 printf(", unable to register update task\n");
108 return;
109 }
110
111 sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[0]);
112 sensordev_install(&sc->sc_sensordev);
113
114 printf("\n");
115 }
116
117 void
sdtemp_refresh(void * arg)118 sdtemp_refresh(void *arg)
119 {
120 struct sdtemp_softc *sc = arg;
121 u_int8_t cmd;
122 int16_t data, sdata;
123
124 iic_acquire_bus(sc->sc_tag, 0);
125
126 cmd = JC_TEMP;
127 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr,
128 &cmd, sizeof cmd, &data, sizeof data, 0) == 0) {
129 sdata = betoh16(data) & 0x1fff;
130 if (sdata & 0x1000)
131 sdata -= 0x2000;
132 sc->sc_sensor[JCTEMP_TEMP].value =
133 273150000 + 62500 * sdata;
134 sc->sc_sensor[JCTEMP_TEMP].flags &= ~SENSOR_FINVALID;
135 #if 0
136 printf("sdtemp %04x %04x %d\n", data & 0xffff,
137 (u_int)sdata & 0xffff,
138 sc->sc_sensor[JCTEMP_TEMP].value);
139 #endif
140 }
141
142 iic_release_bus(sc->sc_tag, 0);
143 }
144